72905405728

Names of 72905405728

• Cardinal: 72905405728 can be written as Seventy-two billion, nine hundred five million, four hundred five thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 7.2905405728 × 10¹⁰

Factors of 72905405728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 32001

Divisors of 72905405728

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 8 16 32 67 134 268 536 1072 1103 2144 2206 4412 8824 17648 30829 35296 61658 73901 123316 147802 246632 295604 493264 591208 986528 1182416 2065543 2364832 4131086 8262172 16524344 33048688 34004387 66097376 68008774 136017548 272035096 544070192 1088140384 2278293929 4556587858 9113175716 18226351432 36452702864 72905405728
• Sum of all divisors σ(n): 145811594880
• Sum of proper divisors (its aliquot sum) s(n): 72906189152
• 72905405728 is an abundant number, because the sum of its proper divisors (72906189152) is greater than itself. Its abundance is 783424

Bases of 72905405728

• Binary: 1000011111001100000000011010100100000₂
• Hexadecimal: 0x10F9803520
• Base-36: XHPZV34

Squares and roots of 72905405728

• 72905405728 squared (72905405728²) is 5315198184364295209984
• 72905405728 cubed (72905405728³) is 387506680155807888040650476388352
• The square root of 72905405728 is 270010.0104218361
• The cube root of 72905405728 is 4177.5332035295

Scales and comparisons

• 72,905,405,728 seconds is equal to 2,318 years, 8 weeks, 4 days, 13 hours, 35 minutes, 28 seconds.
• To count from 1 to 72,905,405,728 would take you about four thousand, six hundred thirty-six years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 72905405728 cubic inches would be around 348.1 feet tall.

Recreational maths with 72905405728

• 72905405728 backwards is 82750450927
• The number of decimal digits it has is: 11
• The sum of 72905405728's digits is 49
• More coming soon!